I couldn't help but just watch the first 10 mins.
All I can say is this is gonna be sooooooo epic.
On a visual note. Wow. Wow and some more wow. The lighting, volumetric fog and the detail on the enemies is so good. The skin on the grunts arms etc. ITs very impressive. And to say it smashes the scale in Reach is an understatement.
Also the best cutscene visuals Ive ever seen running in a game engine. They are so beautiful.
EDIT: The CGI cutscenes are unbelieveable. Better and more detailed than any other CGI in games. Only FF Spirits Within is better than this.